import axios from 'axios'
import { MessageBox, Message } from 'element-ui'
import store from '@/store'
//导入auth脚本
import {
  getToken,setToken,clearStorage,getTokenTime,setTokenTime,removeTokenTime } from
  '@/utils/auth'
import qs from 'qs'
//导入刷新token的api脚本
import { refreshTokenApi } from '@/api/user'
// create an axios instance
const service = axios.create({
  baseURL: process.env.VUE_APP_BASE_API, // url = base url + request url
  // withCredentials: true, // send cookies when cross-domain requests
  timeout: 15000 // request timeout
})
/**
* 刷新token
*/
function refreshTokenInfo(){
  //设置请求参数
  let param = {
  token:getToken()
  }
  return refreshTokenApi(param).then(res=>res);
  }
  //定义变量，标识是否刷新token
  let isRefresh = false;

// request interceptor
service.interceptors.request.use(
  config => {
    //获取当前系统时间
let currentTime = new Date().getTime();
//获取token过期时间
let expireTime = getTokenTime();
//判断token是否过期
if(expireTime>0){
//计算时间
let min = (expireTime - currentTime) / 1000 / 60;
//如果token离过期时间相差10分钟，则刷新token
if(min<10){
//判断是否刷新
if(!isRefresh){
//标识刷新
isRefresh = true;
//调用刷新token的方法
return refreshTokenInfo().then(res=>{
//判断是否成功
if(res.success){
//设置新的token和过期时间
setToken(res.data.token);
setTokenTime(res.data.expireTime);
//将新的token添加到header头部
config.headers.token = getToken();
}
return config;
}).catch(error=>{
}).finally(()=>{
//修改是否刷新token的状态
isRefresh = false;
});
}
}
}
    if (store.getters.token) {
      // let each request carry token
      // ['X-Token'] is a custom headers key
      // please modify it according to the actual situation
      config.headers['token'] = getToken()
    }
    return config
  },
  error => {
        //清空sessionStorage
    clearStorage();
    //清空token过期时间
    removeTokenTime();
    // do something with request error
    console.log(error) // for debug
    return Promise.reject(error)
  }
)

// response interceptor
service.interceptors.response.use(
  /**
   * If you want to get http information such as headers or status
   * Please return  response => response
  */

  /**
   * Determine the request status by custom code
   * Here is just an example
   * You can also judge the status by HTTP Status Code
   */
  response => {
    const res = response.data

    // if the custom code is not 20000, it is judged as an error.
    if (res.code !== 200) {
      Message({
        message: res.message || 'Error',
        type: 'error',
        duration: 5 * 1000
      })

      // 50008: Illegal token; 50012: Other clients logged in; 50014: Token expired;
      if (res.code === 50008 || res.code === 50012 || res.code === 50014) {
        // to re-login
        MessageBox.confirm('用户登录信息过期 ，请重新登录 ', '系统提示', {
          confirmButtonText: '登录',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          store.dispatch('user/resetToken').then(() => {
            //清空sessionStorage
clearStorage();
//清空token过期时间
removeTokenTime();
            location.reload()
          })
        })
      }
      return Promise.reject(new Error(res.message || 'Error'))
    } else {
      return res
    }
  },
  error => {
    console.log('err' + error) // for debug
    //清空sessionStorage
clearStorage();
//清空token过期时间
removeTokenTime();
    Message({
      message: error.message,
      type: 'error',
      duration: 5 * 1000
    })
    return Promise.reject(error)
  }
)

//请求方法
const http = {
  post(url, params) {
  return service.post(url, params, {
  transformRequest: [(params) => {
  return JSON.stringify(params)
  }],
  headers: {
  'Content-Type': 'application/json'
  }
  })
  },
  put(url, params) {
  return service.put(url, params, {
  transformRequest: [(params) => {
  return JSON.stringify(params)
  }],
  headers: {
  'Content-Type': 'application/json'
  }
  })
  },
  get(url, params) {
  return service.get(url, {
  params: params,
  paramsSerializer: (params) => {
  return qs.stringify(params)
}
})
},
getRestApi(url, params) {
let _params
if (Object.is(params, undefined || null)) {
_params = ''
} else {
_params = '/'
for (const key in params) {
console.log(key)
console.log(params[key])
if (params.hasOwnProperty(key) && params[key] !== null && params[key]
!== '') {
_params += `${params[key]}/`
}
}
_params = _params.substr(0, _params.length - 1)
}
console.log(_params)
if (_params) {
return service.get(`${url}${_params}`)
} else {
return service.get(url)
}
},
delete(url, params) {
let _params
if (Object.is(params, undefined || null)) {
_params = ''
} else {
_params = '/'
for (const key in params) {
// eslint-disable-next-line no-prototype-builtins
if (params.hasOwnProperty(key) && params[key] !== null && params[key]
!== '') {
_params += `${params[key]}/`
}
}
_params = _params.substr(0, _params.length - 1)
}
if (_params) {
return service.delete(`${url}${_params}`).catch(err => {
message.error(err.msg)
return Promise.reject(err)
})
} else {
return service.delete(url).catch(err => {
message.error(err.msg)
return Promise.reject(err)
})
}
},
upload(url, params) {
return service.post(url, params, {
headers: {
'Content-Type': 'multipart/form-data'
}
})
},
login(url, params) {
return service.post(url, params, {
transformRequest: [(params) => {
return qs.stringify(params)
}],
headers: {
'Content-Type': 'application/x-www-form-urlencoded'
}
})
}
}
  
export default http
